^<55>Mn NMR of Impurity Spin in Metamagnetic CoCl_2・2H_2O
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概要
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Nuclear magnetic resonance of "Mn of an impurity Mn" spin has been in-vestigated in three metamagnetic phases of CoCl.?2H.0 at liquid helium temperatures.The hyperfine field at 1.6 K was found to be - 594.1 -f 0.3 kOe. A strong temperaturedependence of the spin-echo decay time observed at low temperatures indicates thatlow-lying excitation energies of the Mn" spins are much lower than those of the hostCo" spin system. However, there was no temperature dependence of the hyperfinefield in the range from 1.6 to 4?.2 K, and this was attributed tentatively to the longrelaxation time of Mn" spins. 'When external field was applied parallel to the b -axis,jumps of the hyperfine field associated with metamagnetic transitions and an anom-alous change of the electric field gradient were obser'ved.
- 社団法人日本物理学会の論文
- 1977-09-15
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